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used with uncountable nouns or plural countable nouns to mean ‘an amount of’ or ‘a number of’, when the amount or number is not given （与不可数名词或复数可数名词连用）一些，若干 used to refer to certain members of a group or certain types of a thing, but not all of them （指群体中的某些成员或事物的某些类型）某些，部分，有的 Some people find this more difficult than others. 这件事有人觉得难，有人觉得不难。 Some people never seem to put on weight while others are always on a diet. 有些人似乎从来没有增加体重，而其他人总是在节食。 I like some modern music (= but not all of it). 有些现代音乐我喜欢。
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a large number or amount of something 好些；不少的；相当多的 -
a small amount or number of something 少量的；不多的 -
used with singular nouns to refer to a person, place, thing or time that is not known or not identified （与单数名词连用，表示未知或未确指的人、地、事物或时间）某个 - (informal, sometimes ironic)
used to express a positive or negative opinion about somebody/something （表达褒贬意见时用）真可谓，算不上
Word OriginOld English sum, of Germanic origin, from an Indo-European root shared by Greek hamōs ‘somehow’ and Sanskrit sama ‘any, every’.